CA2988192C - Apparatus and method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in medium - Google Patents

Apparatus and method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in medium Download PDF

Info

Publication number
CA2988192C
CA2988192C CA2988192A CA2988192A CA2988192C CA 2988192 C CA2988192 C CA 2988192C CA 2988192 A CA2988192 A CA 2988192A CA 2988192 A CA2988192 A CA 2988192A CA 2988192 C CA2988192 C CA 2988192C
Authority
CA
Canada
Prior art keywords
matter
jet
fluidal
measurement chamber
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CA2988192A
Other languages
French (fr)
Other versions
CA2988192A1 (en
Inventor
Pasi Karki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet Automation Oy
Original Assignee
Valmet Automation Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valmet Automation Oy filed Critical Valmet Automation Oy
Publication of CA2988192A1 publication Critical patent/CA2988192A1/en
Application granted granted Critical
Publication of CA2988192C publication Critical patent/CA2988192C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/38—Diluting, dispersing or mixing samples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/15—Preventing contamination of the components of the optical system or obstruction of the light path
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/34—Paper
    • G01N33/343—Paper pulp
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G01N15/075—Investigating concentration of particle suspensions by optical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/38—Diluting, dispersing or mixing samples
    • G01N2001/386—Other diluting or mixing processes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N2015/0023—Investigating dispersion of liquids
    • G01N2015/003—Investigating dispersion of liquids in liquids, e.g. emulsion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N2015/0042—Investigating dispersion of solids
    • G01N2015/0053—Investigating dispersion of solids in liquids, e.g. trouble
    • G01N2015/0057—Investigating dispersion of solids in liquids, e.g. trouble of filaments in liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N2015/03—Electro-optical investigation of a plurality of particles, the analyser being characterised by the optical arrangement
    • G01N2015/035—Electro-optical investigation of a plurality of particles, the analyser being characterised by the optical arrangement the optical arrangement forming an integrated apparatus with the sample container
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
    • G01N2021/4764—Special kinds of physical applications
    • G01N2021/4769—Fluid samples, e.g. slurries, granulates; Compressible powdery of fibrous samples

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Reciprocating Pumps (AREA)
  • Paper (AREA)
  • Optical Measuring Cells (AREA)

Abstract

An apparatus for optically measuring fluidal matter having fluid as medium and particles non-dissolved in the medium wherein the apparatus comprises a measurement chamber, which is configured to contain the fluidal matter, and a nozzle. The nozzle receives flowable matter and emits a jet of the flowable matter towards or fromwards an optical detector which is associated with the measurement chamber and receives optical radiation from the fluidal matter in the measurement chamber.

Description

Apparatus and method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in medium Field The invention relates to an apparatus and a method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in the medium.
Background Because an optical power source cable is close to a detector cable in the kappa measurement, for example, the fibers of the suspension have to be separate.
Flocks, which easily form, cause noise-like variation in the optical signal which deteriorates the reliability of the measurement results.
The problem has been mitigated by increasing a measurement period and averaging the results over the measurement period. This kind of integration over time makes the measurement very slow. Hence, there is a need to improve the measurements.
Brief description The present invention seeks to provide an improvement in the measurements. According to an aspect of the present invention, there is provided an apparatus as set forth below.
According to another aspect of the present invention, there is provided a method as set forth below.
The invention has advantages. A jet of flowable matter breaks at least a part of aggregates in the fluidal matter in front of a detector, and homogenizes the measured part of the fluidal matter.
List of drawings Example embodiments of the present invention are described below, by way of example only, with reference to the accompanying drawings, in which
2 Figure 1A illustrates an example of an apparatus for optically measuring fluidal matter, a jet and reception of the optical radiation having the same direction;
Figure 1B illustrates an example of an apparatus for optically measuring fluidal matter, a jet and reception of the optical radiation having an opposite direction;
Figure 2A illustrates an example of an apparatus for optically measuring fluidal matter, the apparatus having a plurality of nozzles opposite to detection;
Figure 2B illustrates an example of an apparatus for optically measuring fluidal matter, the apparatus having a plurality of nozzles on the same side with detection;
Figure 3 illustrates an example of an apparatus for optically measuring fluidal matter, the apparatus having a plurality of nozzles on both the same and opposite side with detection;
Figure 4 illustrates an example of an apparatus for optically measuring fluidal matter, the apparatus being configured to direct a jet at an oblique angle with respect to an optical axis of the detector;
Figure 5 illustrates an example of an apparatus for optically measuring fluidal matter, a measurement chamber being a flow-through chamber;
Figure 6 illustrates illustrates an example of a signal processing unit with at least one processor and at least one memory; and Figure 7 illustrates of an example of a flow chart of a method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in the medium.
Description of embodiments The following embodiments are only examples. Although the specification may refer to "an" embodiment in several locations, this does not necessarily mean that each such reference is to the same embodiment(s), or that the feature only applies to a single embodiment. Single features of different embodiments may also be combined to provide other embodiments.
3 Furthermore, words "comprising" and "including" should be understood as not limiting the described embodiments to consist of only those features that have been mentioned and such embodiments may contain also features/structures that have not been specifically mentioned.
It should be noted that while Figures illustrate various embodiments, they are simplified diagrams that only show some structures and/or functional entities. The connections shown in the Figures may refer to logical or physical connections. It is apparent to a person skilled in the art that the described apparatus may also comprise other functions and structures than those described in Figures and text. It should be appreciated that details of some functions, structures, and the signalling used for operation are irrelevant to the actual invention. Therefore, they need not be discussed in more detail here.
Figures 1A and 1B illustrate examples of an apparatus for optically measuring fluidal matter 100. The fluidal matter 100 has fluid as medium 102 and particles 104 non-dissolved in the medium 102. The fluid may be liquid or gas.
In an embodiment, the particles 104 may be insoluble. In an embodiment, the particles 104 may not have dissolved in the medium 102 at the moment of the measurement but may dissolve within a longer period of time. The fluidal matter may be flowing matter which can easily be reshaped without changing its density.
In an embodiment, the fluidal matter 100 may be suspension. The medium 102 of the suspension may be water. The suspension may be wet pulp slurry, sewage or water/liquid having mineral particles of mineral processing. The particles in pulp slurry may be wood fibers, fines and/or other solid particles of paper industry. In an embodiment, the medium 102 may be gas and the particles 104 may be combustion particles of smoke.
The apparatus comprises a measurement chamber 106, which contains the fluidal matter 100. In an embodiment, a sample of the fluidal matter 100 may be taken from a main process pipe to the measurement chamber 100. In an embodiment, no sample is taken and the main process pipe is the measurement chamber 100. The apparatus also comprises at least one nozzle 108, 108'.
4 The at least one nozzle 108, 108' receives flowable matter 110. In an embodiment, the flowable matter may be gas. In an embodiment, the flowable matter 110 may also be flowing matter which can easily be reshaped without changing its density. In an embodiment, the flowable matter 110 may be water or some other liquid. In an embodiment, the flowable matter 110 may not have solid particles. The at least one nozzle 108, 108' emits a jet 114, 114' of the flowable matter 110 towards or fromwards an optical detector 112.
In the example of Figure 1A, the jet 114 flows towards the optical detector 112. The jet 114, 114' may become wider like a cone, which has an opening angle (a solid angle), as the distance from the nozzle 108, 108' becomes larger. The jet is directed towards the optical detector 112, if any part of the jet 114, 114' hits the optical detector 112. That is, the optical detector 112 may then be within the opening (solid) angle of the jet 114, 114'.
Figure 1B, in turn, illustrates an example of an embodiment where the nozzle 108' emits the jet 114' away from the optical detector 112. In this embodiment, the nozzle 108, 108' may be in the vertex or adjacent to the vertex of the opening angle of the (cone-like) jet 114, 114'.
In an embodiment, the jet 114 is directed at the optical detector 112.
In an embodiment, the jet 114' is directed outwards from the optical detector 112.
The nozzle 108' which emits the jet 114' fromwards the optical detector 112 may be adjacent to the optical detector 112, and more particularly the nozzle 108' which emits the jet 114' fromwards the optical detector 112 may be directly adjacent to the optical detector 112. That is, the nozzle 108' may be in physical contact with the optical detector 112. Because of adjacency between the optical detector 112 and the nozzle 108', turbulence of the jet 114 mixes the fluidal matter 106 which is in front of the detector 112 and disturbs the particles and keeps them moving separately.
The optical detector 112 is associated with the measurement chamber 106, which means that the optical detector 112 is in physical contact with the measurement chamber 106. The end of the optical detector 112 may be at the wall level or inside the measurement chamber 106. The optical detector 112
5 receives optical radiation from the fluidal matter 100 in the measurement chamber 106. The optical detector 112 outputs an electrical signal in response to the detected optical radiation.
In an embodiment, the apparatus may comprise the optical detector 112 or the optical detector 112 may be operationally connected with a processing unit 116. The processing unit 116 may comprise at least one processor and at least one memory. The memory may include a suitable computer program code for processing the electrical signal from the optical detector 112.
In an embodiment, the optical detector 112 may comprise a photosensor. In an embodiment, the optical detector 112 may comprise pigtailed photosensor. In an embodiment, the optical detector 112 may comprise a camera.

In an embodiment, the optical detector 112 may comprise spectrometer for processing more than one band of the detected optical radiation separately.
In an embodiment, the apparatus may comprise an optical radiation source 118 for illuminating the fluidal matter 100 in the measurement chamber 106. The optical radiation source 118 may comprise a led, an incandescent lamp, a halogen lamp, a gas discharge lamp, any combination thereof or the like, for example.
In an embodiment, the jet 114 of the at least one nozzle 108, 108' may break aggregates 120 of the particles 104 at least temporarily for the measurement. The aggregates 120 may include flocculates or flocks of fibers.
Figure 2A illustrates an example of an embodiment where there are at least two nozzles 108 emitting a combined jet 114 towards the optical detector 112. The longitudinal axis 122 of the combined jets 114 of the at least two nozzles 108 is parallel to the optical axis 124 in the example of Figure 28.
Figure 2B illustrates an example of an embodiment where there are at least two nozzles 108' around the optical detector 112. The longitudinal axis 122'of the combined jet 114' of the at least two nozzles 108' is parallel to the optical axis 124 in the example of Figure 2B. Figure 2B illustrates an example where the optical detector 112 and the optical radiation source 118 may be combined. The combination may mean that the optical detector 112 and the
6 optical radiation source 118 may be structurally integrated together. In an embodiment, the at least two nozzles 108', the optical detector 112 and the optical radiation source 118 may be structurally integrated together.
Figure 3 illustrates an example of an embodiment, where the apparatus has nozzles 108, 108' at opposite sides of the measurement chamber 106 in a manner which is similar to a combination of apparatuses of Figures 1A

and 1B.
In an embodiment an example of which is shown in Figures 2A, 2B and 3, the apparatus may comprise at least two nozzles 108, 108'. The nozzles 108, 108', which emit their jets 114, 114', may reside in different locations in the measurement chamber 106. In an embodiment, the nozzles 108, 108' reside in opposite sides of the measurement chamber 106 for causing their flows of jets 114, 114' to have opposite directions.
The jet or jets 114, 114' in all embodiments may cause turbulence therearound while flowing through the fluidal matter 100. The turbulence disturbs and causes forces on the particles 104 and aggregates 120 adjacent to the jet or jets 114, 114'. As a result, not only the aggregates 120 directly hit by the jet or jets 114, 114' but also the aggregates 120 near the jet or jets 114, 114' will disintegrate into separate particles at least partly. The optical measurement gives more reliable results when measured from fluidal matter 100 having separate particles 104 than from fluidal matter 100 with aggregates 120.
In an embodiment, the nozzle 108 may emit its jet 114 of the flowable matter 110 such that the longitudinal axis 122 of each of the jet 114 and the optical axis 124 of the optical detector 112 are co-axial. If, in an embodiment, the nozzle 108', which is adjacent to the optical detector 112, has a circular mouth piece around the optical detector 112, it may also emit its jet 114' of the flowable matter 110 such that the longitudinal axis 122 of each of the jet 114' and the optical axis 124 of the optical detector 112 are co-axial. If, in an embodiment, the nozzle 108' is made of a plurality of sub-nozzles adjacently around the optical detector 112, the sub-nozzles may emit their combined jet 114' of the flowable
7 matter 110 such that the longitudinal axis 122 of each of the jet 114' and the optical axis 124 of the optical detector 112 are co-axial.
In an embodiment, a direction of flow of a jet 114 from the nozzle 108 along the longitudinal axis 122 of the jet 108 is co-directional with the reception direction of the optical radiation. In an embodiment shown in Figure 1A, the direction of the flow of a jet 114 from the nozzle 108 along the longitudinal axis 122 of the jet 108 is co-directional with the optical axis 124 of the optical detector 112.
In an embodiment, a direction of flow of a jet 114' from the nozzle 108' along the longitudinal axis 122 of the jet 114' may be opposite-directional to the reception direction of the optical radiation received by the detector 112 along the optical axis 124. Instead of one physical nozzle 108' there may be a plurality of similar nozzles and/or sub-nozzles as shown in Figures 2A and 2B.
In an embodiment, the jet 114, 114' may circulate the fluidal matter 100 in the measurement chamber 106. That is, the jet 114, 114' may make the fluidal matter 100 move in the measurement chamber 106. In this manner, the circulated fluidal matter 100 may also be homogenized.
In an embodiment, the jet 114, 114' may dilute the fluidal matter 100 with the flowable matter 110 in the measurement chamber 106. When the jet 114, 114', which doesn't have particles 104, is emitted and mixed in the fluidal matter 100, the consistency of the fluidal matter 100 may decrease.
In an embodiment an example of which is illustrated in Figures 1A and 3, the apparatus may comprise a pump arrangement 150 may pump the flowable matter 110 to the at least one nozzle 108, 108'. The pump arrangement 150 may be a part of the apparatus in all Figures and embodiments. The pump arrangement 150 may comprise one pump which pumps the flowable matter 110 to all nozzles 108, 108' or each nozzle 108, 108' may have its own pump, i.e.
the pump may be nozzle-specific. One pump of the pump arrangement 150 may pump the flowable matter to more than one nozzle 108, 108'. The data processing unit 116 may control the operation of the pump arrangement 150. A pressure of the flowable matter 110 in the nozzle 108, 108' may be generated with a pool of the
8 flowable matter 110 which is in a higher location than the nozzle 1108, 108' such that the flowable matter 110 is allowed to flow from the pool to the nozzle 108, 108'. However, the pool may need to be filled with the flowable matter 110 using the pump arrangement 150.
Figure 4 illustrates an example of an embodiment, where the jet 114 is directed towards the optical detector 112 at an oblique angle a with respect to the optical axis 124. The oblique angle a may vary in the range from 0 to 180 , not including the limits, i.e. ]0 , 180 [.
In an embodiment, the pump arrangement 150 may pulsate the jet 114, 114' of the flowable matter 110 from the at least one nozzle 108, 108'.
The data processing unit 116 may control the operation of the pump arrangement 150 for causing the pulsation. The pulsation may vary intensity of pressure of the jet 114, 114' in a determined or random manner. That is, the pressure within the nozzle 108, 108' may be increased or decreased periodically by the pump arrangement 150 or by some other means. The pressure in the nozzle 108, 108' and the speed of the jet 114, 114' may be made to vary according to a square wave, triangle wave or a sine wave, for example.
In an embodiment, the pump arrangement 150 may suck the fluidal matter 100 from the measurement chamber 106 and pump the fluidal matter 110 to the at least one nozzle 108, 108' which may then emit the jet 114, 114' the fluidal matter 100 into the measurement chamber 106. In this embodiment, the fluidal matter 100 may be used as the flowable matter 110. If the fluidal matter 100 as such is circulated in this manner, the consistency of the fluidal matter may be kept unchanged. In an embodiment, at least a part of the particles 104 is removed by filtering before emitting the fluidal matter 100 back to the measurement chamber 106. Then the consistency of the fluidal matter 100 in the measurement chamber 106 may decrease because the relative amount of the medium may increase.
In an embodiment, the apparatus may optically measure at least one of the following properties of the fluidal matter 100, which may be paper stock, in the measurement chamber 106: kappa number, brightness. Other measurements
9 may be a particle size measurement and a spectral measurement, for example, which are suitable for sewage and mineral processes in addition to the pulp process.
Figure 5 illustrates an example of an embodiment, where the fluidal matter 100 may flow through the measurement chamber 106. The measurement chamber 106 may be a main process pipe or the measurement chamber 106 may be a part of the sample pipe to which a sample of the fluidal matter 100 is taken from the main process pipe. The fluidal matter 100 may enter the measurement chamber 106 at the upper part of the measurement chamber 106 (may also enter at the lower part). The fluidal matter 100 may then flow out of the measurement chamber 106 at the lower part. A potential location for an exit of the fluidal matter 100 is at or in adjacency of the optical detector 112. The fluidal matter 100 may flow through the measurement chamber 106 also in other embodiments than that of Figure 5.
In an embodiment an example of which is illustrated in Figure 6, the signal processing unit 116 may comprise one or more processors 600 and one or more memories 602 including a computer program code. The one or more memories 602 and the computer program code may, with the one or more processors 600, allow the signal processing unit 152 to control the operation of the apparatus.
Figure 7 is a flow chart of the method for optically measuring fluidal matter 100 having fluid as medium 102 and particles 104 non-dissolved in the medium 102. In step 700, flowable matter is received, and a jet 114, 114' of the flowable matter 100 is emitted, by at least one nozzle 108, 108', towards or fromwards an optical detector 112, which is associated with a measurement chamber 106, which has the fluidal matter 100, and which receives optical radiation from the fluidal matter 100 in the measurement chamber 106.
The method pulsation may be implemented as a logic circuit solution or computer program. The computer program may be placed on a computer program distribution means for the distribution thereof. The computer program distribution means is readable by a data processing device, and it encodes the
10 computer program commands, carries out the measurements and optionally controls the processes on the basis of the measurements.
The computer program may be distributed using a distribution medium which may be any medium readable by the controller. The medium may be a program storage medium, a memory, a software distribution package, or a compressed software package. In some cases, the distribution may be performed using at least one of the following: a near field communication signal, a short distance signal, and a telecommunications signal.
It will be obvious to a person skilled in the art that, as technology advances, the inventive concept can be implemented in various ways. The invention and its embodiments are not limited to the example embodiments described above but may vary within the scope of the claims.

Claims (11)

Claims
1. An apparatus for optically measuring fluidal matter having fluid as medium and particles non-dissolved in the medium wherein the apparatus comprises a measurement chamber, which is configured to contain the fluidal matter, and at least one nozzle;
the at least one nozzle is configured to receive flowable matter and emit a jet of the flowable matter, which is configured to break aggregates of the particles of the fluidal matter, towards or fromwards an optical detector which is associated with the measurement chamber and configured to receive optical radiation from the fluidal matter in the measurement chamber.
2. The apparatus of claim 1, wherein at least one of the at least one nozzle is configured to emit its jet of the flowable matter such that the longitudinal axis of each of the jet and an optical axis of the optical detector are co-axial.
3. The apparatus of claim 1, wherein a direction of flow of a jet from the at least one nozzle along the longitudinal axis of the jet is co-directional with a reception direction of the optical radiation of the optical detector.
4. The apparatus of claim 1, wherein a direction of flow of a jet from the at least one nozzle along the longitudinal axis of the jet is opposite-directional to a reception direction of the optical radiation received by the optical detector along the optical axis.
5. The apparatus of claim 1, wherein the jet is configured to circulate the fluidal matter in the measurement chamber,
6. The apparatus of claim 1, wherein the jet is configured to dilute the fluidal matter with the flowable matter in the measurement chamber.
7. The apparatus of claim 1, wherein the apparatus comprises a pump arrangement configured to pump the flowable matter to the at least one nozzle.
8. The apparatus of claim 7, wherein the pump arrangement is configured to pulsate the jet of the flowable matter from the at least one nozzle.
9. The apparatus of claim 8, wherein the pump arrangement is configured to suck the fluidal matter from the measurement chamber and emit the jet of the fluidal matter to the measurement chamber.
10. The apparatus of claim 1, wherein the apparatus is configured to optically measure at least one of the following properties of the fluidal matter, which is paper stock in the measurement chamber: kappa number, brightness.
11. A method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in the medium, the method comprising receiving flowable matter and emitting, by at least one nozzle, a jet of the flowable matter, which breaks aggregates of the particles of the fluidal matter, towards or fromwards an optical detector, which is associated with a measurement chamber, which has the fluidal matter and which receives optical radiation from the fluidal matter in the measurement chamber.
CA2988192A 2016-12-19 2017-12-08 Apparatus and method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in medium Active CA2988192C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20165988 2016-12-19
FI20165988A FI127733B (en) 2016-12-19 2016-12-19 Apparatus and method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in medium

Publications (2)

Publication Number Publication Date
CA2988192A1 CA2988192A1 (en) 2018-06-19
CA2988192C true CA2988192C (en) 2020-03-31

Family

ID=62561478

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2988192A Active CA2988192C (en) 2016-12-19 2017-12-08 Apparatus and method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in medium

Country Status (5)

Country Link
US (1) US10317340B2 (en)
JP (1) JP6526777B2 (en)
CA (1) CA2988192C (en)
FI (1) FI127733B (en)
SE (1) SE541507C2 (en)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463118B (en) * 1988-02-26 1990-10-08 Btg Kaelle Inventing Ab PROCEDURE AND DEVICE FOR DETERMINING THE CONCENTRATION OF A SUBSTANCE CONNECTED TO PARTICLES IN A FLOWING MEDIUM
SE507486C3 (en) * 1991-09-12 1998-07-13 Valmet Automation Kajaani Ltd Method and apparatus for saturating fiber properties with near-infrared spectroscopy
US5420682A (en) 1993-07-02 1995-05-30 Honeywell Inc. Method and apparatus for compensating spectral data with a color sensor
JP3355536B2 (en) 1993-10-26 2002-12-09 不二パウダル株式会社 Imaging equipment for granulation and coating
US5486915A (en) * 1994-04-12 1996-01-23 The Babcock & Wilcox Company On-line measurement of lignin in wood pulp by color shift of fluorescence
US5992245A (en) 1995-10-25 1999-11-30 Freund Industrial Co., Ltd. Particle measuring device for granule processing apparatus and particle measuring method
JPH11258161A (en) * 1998-03-14 1999-09-24 Oji Paper Co Ltd Method and apparatus for determining components of tree and program recording medium for determination method
AU773411B2 (en) * 1999-12-23 2004-05-27 Fpinnovations Determination of kappa number in chemical pulps by raman spectrometry
FI116699B (en) * 2000-01-21 2006-01-31 Metso Automation Oy Method and instrument for measuring suspension
CA2329294C (en) * 2000-12-21 2007-01-02 Pulp And Paper Research Institute Of Canada Method and apparatus for measuring fibre properties
US6940073B1 (en) * 2002-11-08 2005-09-06 Georgia Tech Research Corporation Method for determining the concentration of hydrogen peroxide in a process stream and a spectrophotometric system for the same
JP2005062116A (en) * 2003-08-20 2005-03-10 Mitsubishi Paper Mills Ltd Monitoring method and its device of foreign substance level in pulp slurry
US20050246762A1 (en) 2004-04-29 2005-11-03 International Business Machines Corporation Changing access permission based on usage of a computer resource
JP2008532021A (en) * 2005-03-04 2008-08-14 エフピーイノベイションズ Method for measuring the kappa number of chemical pulp by visible / near infrared spectroscopy
JP2008025087A (en) * 2006-06-21 2008-02-07 Nippon Paper Industries Co Ltd Measuring method and measuring apparatus for sample concentration of papermaking stock
JP6483021B2 (en) * 2013-09-11 2019-03-13 日本製紙株式会社 Method for producing dissolved kraft pulp

Also Published As

Publication number Publication date
SE1751527A1 (en) 2018-06-20
JP6526777B2 (en) 2019-06-05
US20180172585A1 (en) 2018-06-21
SE541507C2 (en) 2019-10-22
US10317340B2 (en) 2019-06-11
FI127733B (en) 2019-01-15
CA2988192A1 (en) 2018-06-19
JP2018105860A (en) 2018-07-05
FI20165988L (en) 2018-06-20

Similar Documents

Publication Publication Date Title
JP2008534974A (en) Viscosity change and measurement
JP2016522409A5 (en)
CA2988192C (en) Apparatus and method for optically measuring fluidal matter having fluid as medium and particles non-dissolved in medium
CN210375566U (en) Transformer oil leakage early warning device
RU2012135462A (en) DETECTION DEVICE AND METHOD OF DETECTION
EP2843392A3 (en) Apparatus for photometric measurement of biological liquids
RU2013121131A (en) Microwave Unit for Decontamination of Compound Feed
WO2018110043A1 (en) Aggregation monitoring method, aggregation monitoring device, aggregation monitoring probe, and aggregation system
BG3093U1 (en) Apparatus for analyzing a process slurry flow sample
CN201615883U (en) Dust concentration sensor
JP7352913B2 (en) Fine bubble supply device and fine bubble analysis system
AU2016389170C1 (en) Mist extinguishing system
CN105091754B (en) A kind of portable fiber analyzer
JP2010223598A (en) Flaw inspection device for sheet-like article
CN207832693U (en) A kind of intelligent optical comparison fabric inspecting system
EP3203210B1 (en) Particle size distribution measuring apparatus and particle size distribution measuring method
SG191527A1 (en) Ultrasonic cleaning method
CN109211926A (en) A kind of detection device and its method of laser two-way hollow fiber film assembly integrality
CN214851192U (en) Photoelectric liquid level switch foam interference prevention device
JP2010043985A (en) Optical fiber inspection apparatus
Yan et al. A flow loop system for study of fibre suspension flocculation
CN109975305A (en) A kind of intelligent optical comparison fabric inspecting system
EP3746766B1 (en) Sensor system for detecting contaminant in fluid
CN107655797A (en) Air-borne dust detection device between agalloch eaglewood truck
JP6020340B2 (en) Ultrasonic flaw detection method and ultrasonic flaw detection apparatus